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authorJan Kara <jack@suse.cz>2020-07-28 16:04:36 +0300
committerTheodore Ts'o <tytso@mit.edu>2020-08-07 21:12:36 +0300
commite7bfb5c9bb3d63cb2abb3ceaf1a429d9f02f942d (patch)
tree18846b883f97a443daf02ea7687ab91ffb525b98 /fs/ext4
parent3f67e7cffa6ee2d49ccb697c569c6d30e6024160 (diff)
downloadlinux-e7bfb5c9bb3d63cb2abb3ceaf1a429d9f02f942d.tar.xz
ext4: handle add_system_zone() failure in ext4_setup_system_zone()
There's one place that fails to handle error from add_system_zone() call and thus we can fail to protect superblock and group-descriptor blocks properly in case of ENOMEM. Fix it. Reported-by: Lukas Czerner <lczerner@redhat.com> Reviewed-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20200728130437.7804-6-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/block_validity.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c
index 9c40214f31f9..2d008c1b58f2 100644
--- a/fs/ext4/block_validity.c
+++ b/fs/ext4/block_validity.c
@@ -235,10 +235,13 @@ int ext4_setup_system_zone(struct super_block *sb)
for (i=0; i < ngroups; i++) {
cond_resched();
if (ext4_bg_has_super(sb, i) &&
- ((i < 5) || ((i % flex_size) == 0)))
- add_system_zone(system_blks,
+ ((i < 5) || ((i % flex_size) == 0))) {
+ ret = add_system_zone(system_blks,
ext4_group_first_block_no(sb, i),
ext4_bg_num_gdb(sb, i) + 1, 0);
+ if (ret)
+ goto err;
+ }
gdp = ext4_get_group_desc(sb, i, NULL);
ret = add_system_zone(system_blks,
ext4_block_bitmap(sb, gdp), 1, 0);